Rotary pump.



No. 721,863. PATENTED MAR. 3, 1903 W. B. COOK.

ROTARY PUMP.

APPLICATION FILED 001229, 1901.

4 SHEETS-SHEET 1.

10 MODEL.

I stwgntoz .1 V v fllftozn No. 721,863. PATBNTED MAR. 3, 1903.

W. E. 000K.

ROTARY PUMP.

- I APPLICATION FILED 001'. 29, 1901.

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ZA/ZZ'WMZ Hui-721,863.. PATENTED MAR 3, 1903.; W. E. 000K.

ROTARY PUMP.

APPLICATION rmm 00129, 1901. no MODEL. 4 sung-sum 3..

% atboznegp I I Roi-721,863. PATENTED MAR. 3, 1903.

' W. B. 000K.

ROTARY PUMP.

' APPLICATION IILED 0011.29; 1901. no xonnL. 4 sums-gun? iihag M921 UNITED STATES PATENT OFFICE.

WILLIAM E. COOK, OF LONDON, ENGLAND.

ROTARY PUMP.

SPECIFICATION forming part of Letters Patent No. 721,863, dated March 3, 1903.

Application filed October 29, 1901. Serial No. 80,428. (No model.) 7

To all whom it may concern.-

Be it known that I, WILLIAM E. COOK, asubject of the King of Great Britain, residing at London, in the county of London, England, have invented certain new and useful Improvements in Rotary Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in rotary pumps; and it consists in a pump made up of drums mounted one within the other, but with one drum arranged eccentric with respect to the other, so that the drums will come together at one point, but will diverge toward the opposite point upon their peripheries, one of said drums having vanes adapted to extend across the space between the drums at their separated parts, together with means for introducing liquids between the drums and means for permitting of its escape therefrom, thy stricture being su ch that as the drums are rotated ttigetheriaheir ecgradually from 1155i? meeti'iig point todraw inliquid to be pumped, and a continued rotion, of the pump. Fig. 3 is a longitudinal Vertical section of the pump shown in Figs. 1 and 2. Fig. 4 is a cross-section on the line A A'of Figs. 1 and 3 looking toward the left. Fig. 5 is a cross-section on the line B B of Figs. 1 and 3 looking toward the right. Fig. 6 is a similar view to Fig. 3, but shows a modification of the vane-guides. Fig. 7 is a longitudinal vertical section of a modified form of the pump. Fig. 8 is a cross-section on line C O of Fig. 7. Fig. 9 is alongitudinal vertical section of another modification of the pump. Fig. 10 is a cross-section on line D D of Fig. 9. Fig. 11 is a diagram showing the arrangement of the links connecting the drums.

The same letters of reference indicate similar parts in the various figures.

Referring to Figs. 1 to 5, a is a drum fixed centrally to'a rotary shaft 1), which passes through suitable bearings 0, carried by hollow standards 01 d. e is a drum which is of greater diameter than the drum a and is journaled so as to rotate about the outside of the bearings c and about its own central axis.

In order to thus journal the drum 6, the hub portions thereof are provided with annular flanges e e, which project into annular grooves e e formed in the inner faces of the standard-heads, said grooves being concentric with the drum e, but eccentric to the drum a. The drums at and c are adapted to rotate in contact with one another, and the drum a carries-vanes f j, which travel upon circular guides g, carried by the bearings c. The circumferences of the guides g are concentric with the drum 6, but eccentric to the .drum 0.. As, therefore, the drums a and e rotate the vanes f f extend across the space between the inner periphery of the drum 6 and the outer periphery of the drum (1. The shaft bis .driven by band and-pulley or any other appropriate gear from any convenient source of power, and the drums a and e are connected by links h. As the shaft 17 rotates and carries with it the drum (1, the drum 6 therefore also rotates. It is obvious, however, that, if preferred, the drum 6 may be driven and may carry the drum 0. with it. The bearings c are respectively provided with chambers z'j, connected by suitable ports with the hollow standards (1 d. When the drums at and e are rotated in the direction indicated by the arrows in Figs. 4 and 5, as each of the vanes f recedes from the point of contact between the drums the space inclosed between said vane and the inner periphery of the drum 6 and the outer periphery of the drum a expands, and fluid therefore enters said space through a port it, the hollow standard d, a port Z, the chamber 1, a fixed segmental port min one of the bearings c, and a traveling passage n and a port n, carried by the drum 6. As the drums continue to rotate the communication between the passage n and the port m is closed, and when the vane approaches the point of contact between the drums the said space between the vane and the drums a and e (which space now contains the fluid) contracts, the said fluid is forced through a port 0 and passage 0, carried by the drum 6, a segmental port 1) in the other bearing 0, with which the passage 0 cooperates, the chamberj, a port q, the hollow standard d, and a port 0'.

In the modification shown in Fig. 6 the fixed guides 9 above described are replaced by circular guides g, carried by the end covers of the drum 6 and concentric with said drum.

In the pump shown in Figs. '7 and 8 the drums at and e, the standards, the bearings, and the passages and ports are the same as in Figs. 1 to 6. The vanes f, however, are adapted to reciprocate in recesses 3, carried by the drum e, and are held in contact with the periphery of the drum (1 by springs 23.

Referring to Figs. 9 and 10, the drum 0. is adapted to rotate centrally about a fixed tube it, provided with a partition 1;. The drum 6 is adapted to rotate centrally about a diiferent axis to that of the drum (1 and is carried by the bearings c c. The drum e is driven by band-and-pulley gear, and the two drums are linked together by links h. When the drums rotate in the direction indicated by the arrow in Fig. 10, as each of the vanes leaves the point of contact between the two drums the space inclosed between said vane, the inner periphery of the drum 6, and the outer periphery of the drum a expands, and fluid is thereby drawninto said space through one end of the tube It in the direction indicated by the arrow at the right-hand side of Fig. 9, through a port to in said tube, and through a passage 00. As the drums continue to rotate the port in is closed, and when the vane approaches the point of contact be tween the drums the aforesaid space inclosed between the vanes and the inner periphery of the drum e and the outer periphery of the drum or contracts, thereby forcing the fluid through a passage y and a port z into the opposite end of the tube a, from which it is conducted to any required point.

Fig. 11 shows clearly the manner in which the drums a and e are linked together. The links it at one end are pivoted at equidistant points to the drum a on a circular line concentric with said drum. The other ends of the links h are pivoted at equidistant points to the drum 6 on a circular line concentric with said drum. These two circular lines are of the same diameter, and that on the drum (2 is indicated by a dot-and-pick line.

In all the figures I have shown three vanes provided with suitable passages and ports; but it is obvious that the number of vanes, with their corresponding passages and ports, may be varied to suit requirements. I may,

if found desirable, provide any or all of the passages and ports with check-valves of any well known construction and may line the outer drum or coat the inner drum with any appropriate packing material.

Having now described my invention, what I claim as new, and desire to obtain by Letters Patent, is-

1. Arotarypump,comprisingeccentricallymounted, nested drums, links pivotally connecting and loosely locking said drums to- :gether for effecting unison of movement theret of, means for introducing liquids between the drums at the point of separation during revolution, and means for permitting the liquid to be discharged from between the drums at the point of contact thereof, the structure being such that the eccentric mountings of the drums will cause them first to draw in the liquid and then force it out again, substantially as described.

2. Arotarypump,comprisingeccentricallymounted rotary, nested drums, links pivotally connected with and locking the drums together so that they will move in unison, means partitioning the space between the drums into movable chambers for carrying liquid along with the drums, inlet-passages for permitting the entrance of liquid between the drums where they separate, and outlet-passages for receiving the liquid from between the drums when they come together again, substantially as described.

3. A rotary pum p,com prising eccentricallyarranged drums one within the other, vanes adapted to extend across the space between the drums where they do not touch, links connecting the drums pivotally so that when one drum moves the other will move also, inletports extending through the bearings of the drums so as to admitliquid between the drums where they are separated, outlet passages adapted to receive liquid from between the drums when they come together again and conducting the same through the bearings of the drums and hollow standards supporting said drums and designed to conduct said fluid after leaving said passages, whereby a continuous rotation of the drums will efiect a pumping of said liquid, substantially as described.

t. A rotary pump, comprising an inner drum and an outer drum mounted eccentrically with respect to each other, passages connecting with the space between the peripheries of the drums, passages in the journalsupports of the said drums, connecting ports interposed between said passages adapted to be opened and closed by the rotation of the drums, vanes for bridging the space between the drums where they are separated so as to move the liquid with the movement of the drums, and means for driving one of the drums, and links loosely connecting the inner drum with the end wall of the outer drum, substantially as described.

5. A rotary pump, comprising inner and outer eccentrically-arranged drums, vanes for bridging the space between the drums where they separate, bearings for supporting the said drums, means connecting said drums together for effecting unison of movement thereof, inwardly-extending sleeves projecting into 1 the inner drum, disks at the inner ends of said sleeves and engaging bearings formed *0 upon the inner edges of the vanes, the structure being such that as the drums revolve the disks will keep the vanes against the inner surface of the outer drum, substantially as described.

In testimony whereof I hereunto affix my 15 Signature in presence of two witnesses.

WILLIAM E. COOK. Witnesses:

GEO. P. S. KELSEY, EUSTACE H. BARKER. 

